/**
 * @author feng
 * @Date 2021/7/26 10:00
 */
public class Test01 {
    public static void main(String[] args) {
        Dog dog = new Dog();
        dog.run();

    }
}

class Dog extends Annimal {

    @Override
    public void run() {
        System.out.println("狗杂种");
    }
}

abstract class Annimal {
    abstract void run();
}